package com.ruoyi.common.utils.file;

import java.io.File;
import java.io.IOException;
import java.nio.file.Paths;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Objects;
import java.util.UUID;

import com.aliyun.oss.OSS;
import com.aliyun.oss.model.PutObjectResult;
import com.ruoyi.common.config.AliyunOssConfig;
import com.ruoyi.common.exception.ServiceException;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.FilenameUtils;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.exception.file.FileNameLengthLimitExceededException;
import com.ruoyi.common.exception.file.FileSizeLimitExceededException;
import com.ruoyi.common.exception.file.InvalidExtensionException;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.uuid.Seq;

/**
 * 文件上传工具类
 *
 * @author ruoyi
 */
@Component
@Slf4j
@RequiredArgsConstructor
public class FileUploadUtils {

    private final OSS ossClient;

    private final AliyunOssConfig aliyunOssConfig;
    /**
     * 默认大小 50M
     */
    public static final long DEFAULT_MAX_SIZE = (long) 50 * 1024 * 1024;

    /**
     * 默认的文件名最大长度 100
     */
    public static final int DEFAULT_FILE_NAME_LENGTH = 100;

    /**
     * 默认上传的地址
     */
    private static String defaultBaseDir = RuoYiConfig.getProfile();

    public static void setDefaultBaseDir(String defaultBaseDir) {
        FileUploadUtils.defaultBaseDir = defaultBaseDir;
    }

    public static String getDefaultBaseDir() {
        return defaultBaseDir;
    }




    /**
     * 文件上传
     *
     * @param file 上传的文件
     * @return 返回上传成功的文件名
     */
    public String upload(MultipartFile file) {
        log.info("\n<<------OSS文件上传开始-------->>\n" + file.getOriginalFilename());
        String dir = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        // 判断文件
        String originalFilename = file.getOriginalFilename();
        String cloudFileName = new SimpleDateFormat("HH:mm:ss").format(new Date()) +
                "-" +
                UUID.randomUUID() +
                getExtensionName(originalFilename);
        // 设置上传到云存储的路径
        String cloudPath = dir + "/" + cloudFileName;
        try {
            // 图片上传
            PutObjectResult result = ossClient.putObject(aliyunOssConfig.getBucket(), cloudPath, file.getInputStream());
            if (result != null) {
                log.info("\n<<------OSS文件上传成功------>>\n " + aliyunOssConfig.getMarketHost() + "/" + cloudPath);
                return aliyunOssConfig.getMarketHost() + "/" + cloudPath;
            }
        } catch (IOException e) {
            throw new ServiceException("上传失败", 500);
        }
        return null;
    }

    /**
     * @param filename 文件名
     * @description 获取文件拓展名
     * @method getExtensionName
     * @author Johnson
     * @date 2022/9/21 21:21
     **/
    private String getExtensionName(String filename) {
        if ((filename == null) || (filename.isEmpty())) {
            return filename;
        }
        int dot = filename.lastIndexOf('.');
        if ((dot > -1) && (dot < (filename.length() - 1))) {
            return filename.substring(dot);
        }
        return filename;
    }
    /**
     * 编码文件名
     */
    public static String extractFilename(MultipartFile file) {
        return StringUtils.format("{}/{}_{}.{}", DateUtils.datePath(),
                FilenameUtils.getBaseName(file.getOriginalFilename()), Seq.getId(Seq.uploadSeqType), getExtension(file));
    }

    public static File getAbsoluteFile(String uploadDir, String fileName) throws IOException {
        File desc = new File(uploadDir + File.separator + fileName);

        if (!desc.exists()) {
            if (!desc.getParentFile().exists()) {
                desc.getParentFile().mkdirs();
            }
        }
        return desc;
    }

    public static String getPathFileName(String uploadDir, String fileName) {
        int dirLastIndex = RuoYiConfig.getProfile().length() + 1;
        String currentDir = StringUtils.substring(uploadDir, dirLastIndex);
        return Constants.RESOURCE_PREFIX + "/" + currentDir + "/" + fileName;
    }

    /**
     * 文件大小校验
     *
     * @param file 上传的文件
     * @return
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws InvalidExtensionException
     */
    public static void assertAllowed(MultipartFile file, String[] allowedExtension)
            throws FileSizeLimitExceededException, InvalidExtensionException {
        long size = file.getSize();
        if (size > DEFAULT_MAX_SIZE) {
            throw new FileSizeLimitExceededException(DEFAULT_MAX_SIZE / 1024 / 1024);
        }

        String fileName = file.getOriginalFilename();
        String extension = getExtension(file);
        if (allowedExtension != null && !isAllowedExtension(extension, allowedExtension)) {
            if (allowedExtension == MimeTypeUtils.IMAGE_EXTENSION) {
                throw new InvalidExtensionException.InvalidImageExtensionException(allowedExtension, extension,
                        fileName);
            } else if (allowedExtension == MimeTypeUtils.FLASH_EXTENSION) {
                throw new InvalidExtensionException.InvalidFlashExtensionException(allowedExtension, extension,
                        fileName);
            } else if (allowedExtension == MimeTypeUtils.MEDIA_EXTENSION) {
                throw new InvalidExtensionException.InvalidMediaExtensionException(allowedExtension, extension,
                        fileName);
            } else if (allowedExtension == MimeTypeUtils.VIDEO_EXTENSION) {
                throw new InvalidExtensionException.InvalidVideoExtensionException(allowedExtension, extension,
                        fileName);
            } else {
                throw new InvalidExtensionException(allowedExtension, extension, fileName);
            }
        }
    }

    /**
     * 判断MIME类型是否是允许的MIME类型
     *
     * @param extension
     * @param allowedExtension
     * @return
     */
    public static boolean isAllowedExtension(String extension, String[] allowedExtension) {
        for (String str : allowedExtension) {
            if (str.equalsIgnoreCase(extension)) {
                return true;
            }
        }
        return false;
    }

    /**
     * 获取文件名的后缀
     *
     * @param file 表单文件
     * @return 后缀名
     */
    public static final String getExtension(MultipartFile file) {
        String extension = FilenameUtils.getExtension(file.getOriginalFilename());
        if (StringUtils.isEmpty(extension)) {
            extension = MimeTypeUtils.getExtension(Objects.requireNonNull(file.getContentType()));
        }
        return extension;
    }
}
